Adjustable rear sight for rifles



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UNITED STATES PATENT OFFICE.

GEORGE S. LEWIS, OF CHICOPEE FALLS, MASSACHUSETTS, ASSIGNOR TO PAGE-LEWIS ARMS COMPANY, OF CHICOPEE FALLS, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

ADJUSTABLE REAR SIGHT FOR RIFLES.

Application filed May 28, 1921.

To all whom it may concern:

Be it known that I, GEORGE S. LEwIs, citizen of the United States, residing at Chicopee Falls, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Adjustable Rear Sights for Rifles, of which the following is a specification.

This invention relates to rear sights for rifles, and more particularly to a peep sight which is easily and quickly adjusted and locked in adjusted position.

One object of the invention is to provide a simple rear sight which is compact in construction and of great durability. A novel feature of the device is the positiveness of operation and the means for locking the sight in adjusted position.

In the present embodiment of the invention, a novel construction and arrangement of parts is shown whereby a peep sight is provided which is easily assembled and very inexpensive to construct.

In the accompanying drawings which illustrate a preferred embodiment of my in vention,

Figure 1 is a side elevation of my sight mounted on a rifle barrel, the adjusting sleeve and locking nut being in section;

Fig. 2 is a rear elevation, the adjusting sleeve and locking nut being removed and showing a lower portion of the sight blade inserted in the sight post,

Fig. 3 is a cross-section taken on the line 3-3 of Fig. 1, and

Fig. 4 is a perspective view or the upper portion of the sight blade.

Referring to the drawings in detail, the sight is secured to the rifle 1 by the usual means consisting of the base 2 which is preferably provided with the upturned ears 3 through which a pivot screw 4 is secured. Mounted on the pivot screw 4 and fitting between the ears 3 is the base portion 5 of the sight post 6. By means of this construction which is Well known in rifle sights the sight is adapted to be swung on a horizontal axis and the base portion 5 is preferably provided with means to limit the movement of the post in one direction, consisting of a lug or stop 7 which, when the sight is swung to the right in Fig. 1, will engage the base 1 and prevent further movement in that direction.

Specification of Letters Patent.

Patented Dec. 27, 1921.

Serial No. 473,293.

The sight post 6 is cylindrical in form and preferably provided with a diametrical slot 8 at right angles to the axis of the rifle and extending to the base portion 5. In this slot 8 there is fitted the sight member 9 which in the present embodiment consists of a flat blade, the upper end of which is circular in shape and provided with the sight aperture 10. The sight blade 9 is also provided with screw threads 11 along its edges preferably extending the entire length thereof. The sight post 6 has a diameter equal to the distance between the bottom of the threads 11 on the opposite edges of the sight blade 9 whereby, when the sight blade 9 is inserted in the slot 8 the threads 11 will project through the slot beyond the cylindrical surface of the sight post 6 and form interrupted portions of a continuous screw thread.

At the upper end at opposite sides of the sight post 6 and at right angles to the slot 8 as shown in Fig. 1, are formed shoulders 12. Mounted on the sight post 6 between the shoulders 12 and the base portion 5 is the adjusting sleeve 13 having a plurality of slots 14; preferably extending from the upper end t ereof to a point a little more than half its length. The outer surface of this sleeve is preferably knurled so that it can be readily rotated. The adjusting sleeve, 13 is bored to fit the cylindrical surface of the sight post 6 between the shoulders 12 and base portion 5 and is internally threaded preferably throughout its length to engage the threads 11 of the sight blade 9. It is obvious when the sight blade 9 is inserted in the slot 8 and the adjusting sleeve 13 is in position on the sight post 6 that a rotation of the adjusting sleeve 13 will by its screw threaded engagement with the sight blade 9 adjust the latter to any position desired, the, adjusting screw 13 being held from lateral movement on the sight post 6 by the shoulders 12 and the base portion 5.

In order to lock the parts in adjusted position I have provided means to compress the slotted end of the adjusting sleeve 13 against the sight-post and the threaded edges of the sight blade whereby the adjusting sleeve is prevented from rotating after the sight is adjusted. This means consists preferably of a tapered threaded portion 15 on the upper end of the adjusting sleeve 13 and a locking nut rattsaiaa 16, the outside surface of which is knurled to facilitate its turning, engaging said tapered portion 15 so that when the locking nut 16 is turned down on the thread 15 it will draw the slotted end sections of the sleeve together, compressing them against the sight post and the threaded portions of the sight blade, thereby preventing the adjusting sleeve from being rotated until the locking nut is loosened.

It will be observed that a rear sight has been constructed in which by reason of the flat shape of the sight member, and its corresponding slot in the sight post, the adjusting sleeve engaging the threaded edges of the sight member for the entire distance that it is inserted in the slot, a great rigidity is imparted to the sight member and there is no danger of the blade twisting or being dislodged from longitudinal alinement with the front sight.

The locking means secures the adjusting sleeve against both the sight post and the sight blade whereby the latter is doubly locked in adjusted position.

lVhat I claim is:

1. A rear sight for rifles comprising a base mounted on the rifle, a sight post secured to said base, a compressible sleeve rotatably mounted on said post, a sight member having a shank vertically movable in said post and arranged to be actuated by said sleeve to different adjusted positions, and means to compress said sleeve to lock the parts in adjusted position.

2. A rear sight for rifles comprising a base mounted on a rifle, a diametrically slotted sight post secured to said base, a compressible sleeve rotatably mounted on said post, a sight member having a blade fitting in the slot of said post and arranged to be actuated by said sleeve to different adjusted positions and means to compress said sleeve to locksaid parts in adjusted position.

3. A rear sight for rifles comprising a base mounted on a rifle, a slotted sight post secured to said base, a sight member having a blade vertically movable in said sight post and provided with a screw threaded portion projecting through said slot, an internally screw threaded sleeve rotatably mounted on said sight post and engaging the threaded portion of said blade to adjust the same to different positions, said sleeve having a slotted end and a tapered threaded portion, and a lock nut engaging said tapered threaded portion to compress the sleeve.

4. A rear sight for rifles comprising a base mounted on a rifle, a diametrically slotted sight post hingedly secured to said base and having shoulders at its upper end, a sight member having a blade vertically movable in said sight post and having screw threaded portions projecting through the slots of said sight post, an internally screw threaded sleeve rotatably mounted on said sight post and engaging the threaded portions of said blade to adjust the blade to different positions, said sleeve having a slotted end and a tapered threaded portion adjacent thereto and a lock nut engaging said tapered threaded portion to compress the slotted end of said sleeve and lock the parts in adjusted position.

In testimony whereof I have affixed my signature.

GEORGE S. LEWIS. 

